4
Figure 1. Relative intensity vs. wavelength.
WAVELENGTH – nm
RELATIVE LUMINOUS INTENSITY
1.0
0.2
0
600 700400 650550
500450
0.4
0.6
0.8
BLUE GREEN
Electrical /Optical Characteristics Table
T
A
= 25°C
Parameter Symbol Min. Typ. Max. Units Test Conditions
Forward Voltage
Blue (λ
d
= 470 nm) V
F
3.8 4.0 V I
F
= 20 mA
Green (λ
d
= 525 nm) 3.8 4.0
Reverse Voltage V
R
5VI
R
= 10 µA
Capacitance
Blue (λ
d
= 470 nm) C 43 pF V
F
= 0, f = 1 MHz
Green (λ
d
= 525 nm) 43
Thermal Resistance Rθ
J-PIN
240 °C/W LED Junction-to-Cathode Lead
Peak Wavelength
Blue (λ
d
= 470 nm) λ
P
467 nm Peak of Wavelength of Spectral
Green (λ
d
= 525 nm) 520 Distribution at I
F
= 20 mA
Spectral Halfwidth
Blue (λ
d
= 470 nm) ∆λ
1/2
24 nm Wavelength Width at Spectral
Green (λ
d
= 525 nm) 35 Distribution Power Point at I
F
= 20 mA
Luminous Efficacy
Blue (λ
d
= 470 nm) ηv 75 lm/W Emitted luminous power/Emitted
Green (λ
d
= 525 nm) 520 radiant power
Notes:
1. 2θ1/2 is the off-axis angle where the luminous intensity is
1
/2 the on axis intensity.
2. The radiant intensity, Ie in watts per steradian, may be found from the equation Ie = Iv/ηv where Iv is the luminous intensity in candelas and ηv is
the luminous efficacy in lumens/watt.
